JPH0333606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a roller conveyor.

[Conventional technology]

It is well known that conveyors have been used for a long time to continuously transport bulk materials such as ore, coal, earth and sand, and cement, as well as cargo packed in boxes, bales, or bags. . However, in industrial fields such as the automobile industry and the electrical/electronic industry, conveyor systems, which have traditionally been considered as an auxiliary means of production, have recently come to be considered as an important piece of production equipment. Many attempts have been made to improve conveyors in response to various requests.

For example, a conveyor system used for mass production (improving efficiency) of assembly work temporarily stops the transferred basics at an appropriate location, attaches the necessary parts while the conveyor is stopped, and resumes the transfer at any time after the installation is complete. Conveyors, mainly roller chain conveyors, are widely used, and even if the articles being transported stop for some reason, the following articles will not be forced to hit each other or push each other. Specific examples include the inventions disclosed in Japanese Utility Model Publication No. 50-147387 and Japanese Patent Publication No. 58-46406, but in both of these inventions, a rail is attached to the axis of the chain as the chain moves. A small roller that rolls on top of the tower and a large roller that supports the load are fitted in a rotatable state, and a moderate amount of friction is generated based on the shape of the contact surface between the small roller and the large roller. The large roller rotates in conjunction with the small rollers to transfer the material on the tower at a higher speed, and at other times it stops or rotates in reverse without being controlled by the rotation of the small rollers to speed up the transfer of the material on the tower. It has a mechanism to reduce or stop it. However, these roller chain conveyors have a number of problems, such as causing sideways vibration in the objects on the tower and producing squeaks.

[Problem that the invention seeks to solve]

As described above, the conventional technology has the problem that it is difficult to obtain a roller conveyor that is easy to transport and stop, and that does not cause sideways vibration or squeaks of the loaded material.

[Means for solving problems]

In order to solve the above problems, this invention arranges a plurality of rotatable rollers in parallel on a conveyance path, and a plurality of rod-shaped permanent magnets are fixed radially on the circumference of some or all of the rollers. a rotating shaft,
The roller conveyor is formed of a cylinder made of a non-magnetic material through which the rotating shaft passes through and is rotatable with respect to the rotating shaft.

[Effect]

Conventional driven roller conveyors make appropriate use of the frictional force generated between the contact surfaces of two types of rollers, such as a large roller or a small roller, and when the external force is inferior to this frictional force, the loaded material is transferred, and the frictional force is When an external force equal to or greater than 1 is applied, the roller conveyor stops or moves in the opposite direction, but the roller conveyor of this invention is based on the action of a magnetic field and does not depend on frictional force at all. do not have.

〔Example〕

The details of this invention will be explained below with reference to the drawings.

An example of the roller conveyor of the present invention is shown in a partially cutaway front view of FIG. 1 and a schematic side view of FIG. 2.

First, a rotating shaft 1 is supported at both ends by fixed bearings 2, and rotates in conjunction with a gear 3 driven by a chain. Four rod-shaped permanent magnets 4 are fixed to the rotating shaft 1 at equal intervals in the axial direction. Here, the rod-shaped permanent magnet 4 may have a square, rectangular, trapezoidal, or similar cross-sectional shape, and is magnetized so that the surface in contact with the rotating shaft 1 and the opposite surface thereof are S poles or N poles. It is something that
Further, the number of rod-shaped permanent magnets 4 fixed to the rotating shaft 1 is not limited to four, but it can be said that approximately three to six is usually a practical and preferable number.

Next, the cylinder 5 made of a non-magnetic material through which the rotating shaft 1 passes through is made of, for example, aluminum or its alloy, stainless steel, ceramics, synthetic resin or synthetic rubber, or a composite material or laminated material thereof, and has bearings at both ends. 6 (bearing), the non-magnetic cylinder 5 is rotatable without being affected by the rotation of the rotating shaft 1.

The single roller illustrated in FIG.
A plurality of them were arranged at appropriate intervals as shown in the figure, and the pallet 7 was placed on top of them. The material of the pallet 7 is not particularly limited, but plywood is used to reduce weight, and a thin iron plate 8 is stretched on the bottom plate surface of the pallet 7 in order to sense the magnetism of the bar-shaped permanent magnet 4 rotating inside the roller. Ivy. It should be noted that all of the rollers provided together do not need to be drive rollers, and normal rollers may be appropriately inserted between them.

According to the roller conveyor of the present invention having such a structure, the pallet 7 carrying the loaded material moves as the magnetic field moves due to the rotation of the rod-shaped permanent magnet 4 in the drive roller. If an external force is applied to prevent the movement, the non-magnetic cylinder 5 of the drive roller becomes idly rotating with respect to the rotating shaft 1.
When the external force is removed, the pallet 7 begins to move again, and the non-magnetic cylinder 5 also rotates in synchronization with the rotating shaft 1. For example, if you install four rolls of permanent magnets each with a capacity of 700 to 800G as shown in Figure 2,
It was easy to load items weighing around 20kg, transfer or stop them, and even push them back in the opposite direction.

〔effect〕

The roller conveyor of the present invention uses the movement of the magnetic field caused by the rotation of permanent magnets to move the objects on the tower, and not only can the objects on the tower be easily transferred and stopped at any time, but the rolling portions are Since everything is supported by bearings, it is possible to prevent the occurrence of squeaks due to friction or lateral vibration of the loaded object. Therefore, it can be said that the significance of this invention is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing one embodiment of the roller constituting the roller conveyor of the present invention, and FIG.
The figure is a schematic side view thereof. 1... Rotating shaft, 2... Fixed bearing, 3... Gear,
4... Bar-shaped permanent magnet, 5... Non-magnetic cylinder, 6
...Bearing, 7...Pallet, 8...Iron plate.

Claims (1)

[Claims] 1 A plurality of rotatable rollers are arranged in parallel on a conveyance path, and a rotating shaft having a plurality of rod-shaped permanent magnets radially fixed to the circumferential surface passes through some or all of the rollers. A roller conveyor characterized in that it is formed from a cylinder made of a non-magnetic material that is rotatable about a rotating shaft.